[Avid-L2] Stubborn renders that stay unrendered

Hi All,

I am on 2018.12.3, Mac 10.13.6 and seem to be encountering several cases where I render an upper VITC track and after the Avid takes its time, the section remains unrendered.

At times I've divided up the render until I got to a single frame which finally did render.

Any tips?

Thanks!

D.